Calculating Delta P in Vacuum Chambers: P1 or 0?

  • Context: Undergrad 
  • Thread starter Thread starter ahmed11
  • Start date Start date
  • Tags Tags
    Change Delta
Click For Summary
SUMMARY

In vacuum chambers, calculating delta P (ΔP) requires understanding the pressure conditions involved. When air is absent, ΔP cannot be calculated as both P1 and P2 approach zero, resulting in no driving force. The discussion emphasizes that without external pressure, such as in the case of a shaken cola can in a vacuum, the ΔP is effectively zero, leading to no force upon opening. Therefore, in vacuum conditions, P1 should not be substituted with zero, as it negates the existence of ΔP.

PREREQUISITES
  • Understanding of vacuum chamber physics
  • Knowledge of pressure measurement concepts
  • Familiarity with the principles of fluid dynamics
  • Basic grasp of thermodynamics
NEXT STEPS
  • Research the principles of pressure differentials in vacuum systems
  • Explore the effects of vacuum on liquid behavior in containers
  • Learn about the calculations involved in fluid dynamics under vacuum conditions
  • Investigate the role of external pressure in gas laws
USEFUL FOR

Engineers, physicists, and students studying vacuum technology or fluid dynamics, particularly those interested in pressure behavior in vacuum environments.

ahmed11
Messages
83
Reaction score
0
in calculating the delta p in vacuum chambers do we substitute p1 with 0 or the whole equation doesn't exist if air doesn't exist?
 
Physics news on Phys.org
Could you elaborate on what it is that you are exactly talking about?
 
CrazyNinja said:
Could you elaborate on what it is that you are exactly talking about?
i mean if we shook a cola can in vacuum chamber then the driving force when opened will be zero because there is no delta p. right?
without air then there won't be delta p.
or we assume that p 1 is equal to p2 is equal to zero?
do you get what i mean
 
Why do you think there is no ΔP? (In case you are wondering, there is a "symbols" section in the text from where you can get a "Δ" ). The cola bottle is packed with high pressure and the pressure outside is close to zero.
 

Similar threads

Problem with Bernoulli calculation
  • · Replies 4 ·
Replies
4
Views
707
Undergrad Water bath and water vapor + air mixture in a closed system
  • · Replies 2 ·
Replies
2
Views
2K
Work done in a chamber with gas undergoing adiabatic free expansion?
  • · Replies 13 ·
Replies
13
Views
2K
Undergrad Graduation of air flow inside a vacuum chamber
  • · Replies 4 ·
Replies
4
Views
3K
How can vacuum heating be calculated for substrates in a chamber?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Steam flow rate in 2-chamber steam engine system
  • · Replies 4 ·
Replies
4
Views
2K
Calculating ΔE Difference for 2 Samples of Monatomic Ideal Gas
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Interpreting the energy density of QFT vacuum states
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Why work is PdV and not (P+dP)dV in an isothermal process?
  • · Replies 6 ·
Replies
6
Views
587
Computing Errors when Data Sets are Given
  • · Replies 6 ·
Replies
6
Views
1K